gdisk

Hits :

10,050

GUID Partition Table

lets assume that you want to create a new GPT layout on a disk.
From command line you can use gdisk

Create new layout

BASH

gdisk /dev/sda

o

Y

Create a new partition

eg. you need a 5G rootfs partition:

Create a swap partition

eg. the rest available space is for swap:

Save layout to disk

Verify your changes